Wrench carriage



Jan. 15

N. K. SMITH- WRENCH CARRIAGE Filed Sept. 1922 Patented .Ham. is. ieaaNELSON K. SMITH, F DALLAS,,TES.

WRENCH cinemas-r.

Application filed 8eptember'5, 1922. Serial No. 586,121.

To all whom it may concern:

Be it known that I, NELSON K. SMITH, a citizen of the United States,residing at Dallas, in the county of Dallas and State of Texas, haveinvented certain new and useful Improvements in Wrench Carriages, of

which the following is a specification.

This invention relates to new and useful improvements in carriages forsupporting pipe wrenches on well drilling rotaries.

The invention is in some respects an improvement upon my co-pendingapplication filed Sept. 30, 1921, Serial No. 504,452. The object of theinvention is to provide a car- 1 riag'e with means for securelyfastening a pipe wrench therein together with a latch or holding saidfastening means. A further object is to provide a carriage in which theposition of the wrench may be reversed and the wrench fastened orreleased from the pipe without changing any of the parts of thecarriage. Another object,- is to provide means for fastening the wrenchin the carriage and arranged to release the wrench in the carriage,whereby said wrench is freed from the pipe and still supported in thecarriage. A further object is to mount the jaw of the carriage in such amanner as to compensate for any imperfections in the alinement of theparts, such asthe inclination of the carriage post owing to a wornrotary hole.

- A further object of the invention is to provide fastening means forthe wrench I which may be quickly operated to either fasten or releasethe wrench and which will be ositive in its action.

construction designed to carry out the invention will be hereinafterdescribed to 4 gether with other features of the invention.

The invention will be more readily understood from a reading of thefollowing specification and by reference to the accompanying drawings,in which an example of the invention is shown and wherein:

Fig. l is a perspective view of a carriage constructed in accordancewith my invention and in position on the platform of a rotary andshowing the wrench in engagement with a drill pipe.

Fig.- 2 is an elevation of the carriage, .portions being illustrated insections,

Fig. 3 is a plan view,

Fig. 4 is a cross sectional view of the jaw, and

Fig. 5 is a detail of the jaw mounted.

In the drawings the numeral 10 designates a vertical standard or postwhich is preferiably cylindrical and has its upper end telescoping intoa carriage sleeve 11. The sleeve is provided with an annular chamber 12contiguous to the post and provided with diametrically opposite openings18, which register with a diametrical opening 1 1 in the post 10 whenthe carriage is depressed. A to pin 15 may be inserted thru one of theopenings 13 into the opening 14 and is of such length as to be confinedwithin the chamber 12. This pin limits the upward and downward movementof the sleeve when it is en- 7e gaged by the ends of said chamber. Acollar 16 is confined on the post by a set screw 17 and a coiled spring18 surrounding the post has its lower end seated in the upper side ofthe collar, while its upper end supports thesleeve 11. The spring is ofsuch tension as to normally displac the sleeve 11 to the upper limit ofits movement, in which position its upper end is substantially flushwith the upper end of the post 10, as

is shown in Fig. 2. It will be seen that the carriage sleeve is thusresiliently sustained and may bedepressed when necessary.

A jaw 19 is provided with a transverse depending shank 20 which isfastened to ears 21 on each side of the upper end of the sleeve b meansof bolts 22. The shank is provide with elongated slots 23 thru which thebolts pass and these slots permit a rela tive vertical movement of thejaw so that the latter may have a limited swinging movement whennecessary to compensate for tilting of the post 10. The rear side of thejaw is notched out at 24 so as to provide clearance for the post whenthe carriage is depressed.

.The handle A of a wrench is inserted in the jaw and such wrench isprovided with notches B as is shown in Fig. 4. Disks 25 are rotatablyconfined in the upper and lower portions of the jaw and are connected byan integral pin 26 ecoentrically' mounted im, said disks. The pin isdisposed in the slot 'of the jaw and is adapted to be swung into one ofthe notches B to hold the wrench in position. p

Ontop of --the jaw a hand lever 28 is fastened to the upper disk 25 andis provided with an upwardly bent handle 29 and an angular head 30; Apair of stop lugs 31 are mounted on the rear portion of the jaw on eachside of the notch 24. A shaft 32 passes thru' said lugs and is fastenedby cotter pins 33. When the lever 28 is swung its angular head 30 isbrought into engagement with one of the lugs and limits the swingingmovement of said lever in that direction. A latch 34 has its end slottedand straddling the lugs so that the shaft 32 passes thru its slotted endand the latch is thus hinged'into position. The latch is provided with adepending finger 35 and the adjacent side 36 of the head is beveled orout under to conform the said finger, so that when the latch is swungdown the finger engages said side 36 and prevents swinging of the leverin the opposite direction.

When the handle A of the wrench, such as is shown in my copendingapplication Serial No. 586,122, is inserted in the jaw 19, the lever 28has been previously swung so that the pin 26 is in its outward position.When the handle is in position and the wrench engaged with the pipe, thelever is swung so that the in enters one of the notches B and when thetable C is rotated the engagement between the notch and the pin becomerigid. To release the bite of the wrench on the pipe it is merelynecessary to throw up the latch 34, as the pressure of the handleagainst the in will rotate the same outwardly, thus freeing the wrenchfrom the ipe. This movement of the pin, however, 1s not sufiicient toswingthe pin entirely out of the notch and if the handle is to bewithdrawn from the jaw the lever 28 must be swun to move the pin to itsoutward limit. Angu ar walls 27 are providedat the rear of the jaw topermit the-jaw or the handle A to swim laterally.

It wi 1 be seen that when the latch is in position the lever 28 is heldagainst movement and the pin 26 cannot swing in either direction, thewrench A thus being held in position although iiris free to swing to alimited degree 1n the jaw. When it is desired to reverse the wrench itis also necessary to reverse the latching mechanism and therefore one ofthe pins 33 is removed and the latch inserted on the other lug 31 so asto be engaged by the head 30 which is suitably shaped to carry out itsfunctions. It

' will be seen that by swinging the latch 34 upward and grasping thehandle 29 the lever 28 maybe quickly swung to bring the pin 26 out'ofthe notch B so that the wrench may be easily removed or inserted in thejaw. There are no pins or bolts to be lost and the device is simple andsubstantial. If the pipe should fall or the wrench in any memes otherway be carried downward the spring 18 will yield and prevent breakage.When the wrench is not in use the jaw ma be swung to one side and whenswung ack again will bring the wrench into proper position for fasteningon the pipe.

Various changes in the size and shape of the parts as well asalterations and fnodificationsmay be made within the scope of theappended claims.

What I claim, is: I

1.; In a rotary well carriage, the combination of a post, a carriagemember slidable vertically on the post and resiliently sustained, meansfor fastening a pipe wrench to the carriage member, and a latch forholding the fastening means.

2. In a rotary well carriage, the combination of a post adapted to besupported in a rotary table, a carriage member mounted on the post andhaving a jaw arranged to receive a pipe wrench, a fastening'elementadapted to engage the wrench within the jaw, and means for moving thefastening element into position.

' 3.. In a rotary well carriage, the combination of a post adapted to besupported in a rotary table, a carriage member mounted on the post andhaving a jaw arranged to receive a pipe wrench, a fastening elementadapted to engage the wrench Within the jaw, and a latch for fasteningsaid last named means against operation.

4. In a rotary 'well carriage the combination of asupport, a jaw mountedon the support and adapted to receive the handle of a wrench, afastening device carried in the jaw and adapted to be engaged by awrench handle, and a latch mounted on the jaw and engaging the fasteningdevice and arranged to release the fastening device when disengagedtherefrom, whereby said wrench handle may displace said fastening deviceto freethe wrench from the ipe.

5. In a rotary well carriage,t e combination of a post adapted to bemounted on a rotary table, a sleeve mounted on the post, a jaw offsetlaterally from the sleeve and havin an opening for receiving a pipewrenc fastening means in the jaw for engaging the pipe wrench, and alatch. for holding the fastenin means.

6. In a rotary we-l carriage, the combination of a post, a sleevemounted to slide vertically on the post, a coiled spring surroundin. thepost and supportin the sleeve, 21 latera ly offset jaw connects with"the sleeve, a fastening element carried by the jaw for engaging a pipewrench, means for operating the fastening element, and a latch forlocking said operating means.

7. In a rotary well carriage, the combina tion of a post, a sleevemounted on the 0st, a jaw, a'connection between the jaw an the saidsleeve permitting an independent adjustment of said parts, and means forfastening a pipe wrench in the jaw.

S. In a rotary well carriage, a post, a sleeve mounted on the post, ahorizontal jaw carried by the sleeve, a fastening pin in the jaw, meansfor moving said pin transversely of said jaw, and a latch for holdingsaid moving means against operation.

9. In a rotary well carriage, a post, a sleeve mounted on the post, ahorizontal jaw carried by the sleeve, an eccentric element rotatable inthe jaw, a wrench fastening pin carried by the eccentric element, alever for rotating the element, and means for holding the lever againstoperation.

10. In a rotary well carriage, a post, a

sleeve mounted on the post, a horizontal jaw carried by the sleeve, aneccentric element rotatable in the jaw, a wrench fastening pin carriedby the eccentric element, a lever for rotating the element, and a latchcarried by theh'ead mounted to swing into the path of the lever to holdthe same against operating the element.

11. In a rotary we'll carriage, a post, a sleeve mounted thereon, a jawhaving a shank pivoted to the sleeve, an eccentric rotatable in the jaw,a pin carried by the eccentric and exposed in the opening of the jaw, alever attached to the eccentric, a head on the lever, a latch pivoted onthe jaw, and a finger carried by the latch in position to be engaged bythe head.

In testimony whereof I aflix my si nature.

- NELSON K. S TH.

